The EXFO MaxTester 720C (MAX-720C) is a professional-grade, tablet-inspired Optical Time Domain Reflectometer (OTDR) optimized for access network construction and troubleshooting. In early 2026, while the MAX-720D has been introduced as the current successor, the 720C remains widely used and supported, with official service and calibration guaranteed by EXFO until December 2029.
Core Capabilities
Dual Mode Testing: Combines singlemode (SM) and multimode (MM) testing in a compact unit, ideal for data centers and private enterprise networks.
Dynamic Range: Delivers up to 36 dB in singlemode (for links up to 95 km) and 29 dB in multimode.
Dead Zones: Features industry-leading short dead zones—0.7 m (SM) / 0.5 m (MM) event dead zone—to pinpoint faults on short spans like patch cords.
PON Readiness: Specifically designed for FTTx testing, capable of measuring through optical splitters up to 1x32.
Key Technical Specifications
Feature Details
Display 7-inch, outdoor-enhanced touchscreen (800 x 480 TFT)
Wavelengths 850/1300 nm (MM) and 1310/1550 nm (SM); filtered 1625 nm for live fiber
Battery Life Up to 12 hours of continuous field operation
Storage 2 GB internal memory (holds ~20, 000 OTDR traces)
Connectivity Built-in Wi-Fi, Bluetooth, and two USB 2.0 ports
Advanced Software Features
iOLM (Intelligent Optical Link Mapper): An automated application that uses multi-pulse acquisitions and advanced algorithms to turn complex trace data into a simple, icon-based map with clear go/no-go results.
Linear View: Included standard, this simplifies trace reading by displaying icons for reflective/non-reflective events without needing to toggle screens.
Expert Diagnosis: Includes automatic macrobend finders and real-time modes for immediate link characterization.
Applications
FTTx/PON Construction: Testing through splitters and central-office (CO) link certification.
Data Centers: Tier-2 troubleshooting of high-density fiber installations.
Wireless Infrastructure: Support for fronthaul/backhaul testing, including FTTA, DAS, and small cells.
Accessories & Integration
VPM2X Option: Integrated Power Meter (GeX detector) and Visual Fault Locator (VFL).
Fiber Inspection: Compatible with FIP-400B wireless or USB probes for automated connector certification.
Rugged Design: Built for outside plant environments with no internal fans or vents to fail in harsh conditions.
